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December 28, 2018

Essay on Global Warming | Essay on Climate Change (650 words)

Essay on Global Warming | Essay on Climate Change

Introduction

Global warming is a long-term rise in the average temperature of the Earth's climate system. Due to man induced temperature rise since industrial revolution because of burning of fossil fuels have led to climate change. Such climate change have dangerous impact of human life and property. Mitigation, Adaptation and Rehabilitation action needs done at global level by involving all developed and developing countries halt and reverse global warming.

What is Global Warming

Global warming is a long-term rise in the average temperature of the Earth's climate system, an aspect of climate change shown by temperature measurements and by multiple effects of the warming. The term commonly refers to the mainly human-caused observed warming since pre-industrial times and its projected continuation.

Causes of Global Warming

Fossil fuel burning has produced about three-quarters of the increase in CO2 from human activity over the past 20 years. The rest of this increase is caused mostly by changes in land-use, particularly deforestation. Another significant non-fuel source of anthropogenic CO2 emissions is the calcination of limestone for clinker production, a chemical process which releases CO2.

Impacts of Global Warming and Climate Change

Future climate change and associated impacts will differ from region to region. Ongoing and anticipated effects include rising sea levels, changing precipitation, and expansion of deserts in the subtropics. Future warming is expected to be greater over land than over the oceans and greatest in the Arctic, with the continuing retreat of glaciers, permafrost, and sea ice. Other likely changes include more frequent extreme weather events such as heat waves, droughts, wildfires, heavy rainfall with floods, and heavy snowfall; ocean acidification; and massive extinctions of species due to shifting temperature regimes. Effects significant to humans include the threat to food security from decreasing crop yields and the abandonment of populated areas due to rising sea levels.

Other weather events will also change in frequency and intensity. For instance, he said, there is an increasing frequency of cyclones over the Arabian Sea their number is a decreasing in the Bay of Bengal. However, the ratio of severe cyclones to cyclones is increasing in the Bay of Bengal. Another impact may be the shortage of fish-based protein in the Indian Ocean due to rapid degradation of key ecosystems such as coral reefs, seagrass and mangroves and factors like pollution, overfishing, unsustainable coastal development.

Climate-related risks to health, livelihoods, food security, water supply, human security and economic growth are projected to increase with global warming and the world’s poor are more likely to get hit hardest.

Solutions for Global Warming

Disputes over the implementation of the Paris Agreement at numerous meetings depict the deep divides among rich countries, emerging economies and least developed countries.

To limit warming to the lower temperature goal, the world needs “rapid and far-reaching” changes in energy systems, land use, city and industrial design, transportation and building use, the report said. Annual carbon dioxide pollution levels that are still rising now would have to drop by about half by 2030 and then be near zero by 2050. Emissions of other greenhouse gases, such as methane, also will have to drop. Switching away rapidly from fossil fuels like coal, oil and gas to do this could be three to four times more expensive than the less ambitious goal, but it would clean the air of other pollutants.

Contributions from the U.S. and other rich countries to the Green Climate Fund and other funding mechanisms for the purpose of mitigation and adaptation are vital even to reach the goals of the Nationally Determined Contributions (NDCs) — commitments that each country made prior to the Paris conference.

Conclusion

To limit global warming, countries will have to change policies in sectors like land, energy, industry, buildings, transport, and urban development. “Limiting global warming to 1.5 degree compared with 2 degree would reduce challenging impacts on ecosystems, human health and well-being, making it easier to achieve the United Nations Sustainable Development Goals.